Preheat the Oven: Start by preheating your oven to 350°F (175°C).
Prepare the Ingredients: In a baking pan, arrange the cubed chicken breasts evenly.
Add the Vegetables: Place the chopped potatoes and green beans on top of the chicken, mixing them slightly for an even distribution.
Seasoning: Sprinkle the dry Italian dressing mix evenly over all the ingredients in the baking pan.
Butter it Up: Drizzle the melted butter generously over the top, making sure to cover everything.
Cover and Bake: Cover the baking pan with foil and bake in the preheated oven for about 1 hour and 10 minutes.
Serve and Enjoy: After baking, carefully uncover, and serve hot for a delightful family meal!